Interesting read especially the offspring diversity aspect. Although not related to humans i was thinking how patriarchal societies have tried to reverse this by inbreeding which is definitely not natural. Also found this interesting “Ducks have anatomical barriers blocking insemination; the Cassadene plant beetle can expel unwanted semen. In humans, cryptic female choice is possible since the female ovulation cycle is hidden, allowing females more control over mate choice”
Reminded me that Mason bees can select the gender of eggs they lay! Some animals have amazing natural abilities that we humans can’t achieve without the help of science and technology.